If you mean the original list for those units being mounted by metadata, yes: he is not making them anymore. He has no more free time for this (at least for now). The original version had some issues on some Orics, in which the cumulus simply did not work (and I think that could be one of the reasons why he did not want to build more).

The Cumulus Rev2 is not dead, I'm just lacking time and money to work on it right now, and as Chema says as the original one proved to be unreliable, it is a redesign, the Rev1 will be hard as it is to update to correct the flaws.

So please either buy a microdisc replica with a floppy emulator like the HxC or be patient for the Cumulus Rev2, the project is not dead at all.